John w



(No Model.)

J. W. PLUNKETT.

APPARATUS FOR BURNING GAS.

'jjd'j Patented July 3, 1883.

11v VENT-0R WITNESSES N. PUERS. Phominlhngnahcr. Washington. D. C,

R l I r UNITED STATES PATENT OFFICE.

JOHN WV. .PL UNKETT, OF'DUNSTALL PRIORY, OOUN TY OF KENT, ENGLAND.

APPARATUS Foe BURNING GAS.

SPECIFICATION forming part of Letters Patent No. 280,666, dated July 3, 1883.

Application filed February .36, 1883. (N model.)

ent, No. 6,142, December 23, 1882,) of which the following is a specification.

My invention consists of the combination, with a gas stove or oven, of a device whereby the supply of gas is automaticallyadmitted when the door of the stove or oven is opened and is automatically shut off again when the door is closed, before the gas is ignited or when the gas is accidentally extinguished, as more fully described hereinafter.

In the accompanying drawings, Figure 1 is a side view of a gas-stove with my improvements applied thereto, and Fig. 2 a sectional plan of the same.

The supply-pipe g for the gas is secured to the outside of the stove or oven in any convenient position, and is provided with a cock, h, having a lever, 4', connected to a vertical weighted rod, n, adapted to slide in guides on the side of the oven. The gas-supply pipe 9 passes to the interior of the oven, and is there perforated for the issue of the gas-jets, as indicated by dotted lines in Fig. 1.

The hinged door Z of the oven or stove is provided with an inclined or cam-like projec-- tion, 1;, adapted as the -door is opened to act on the short arm of a lever, q, pivoted to the side of the oven or stove, so as to raise the long arm of the said lever. This in turn acts on the weight or projection n secured to the vertically-sliding rod a, so as to raise the said rod, and thus open the cock h to. admit the sup ply of gas to the interior of the stove or oven as the door Z is opened.

- Within the interior of the stove or oven is an expansionbar, 7c, secured at oneend to the casing of the oven and at the other pivoted to the lever j, which in turn is pivoted to the frame at 9', and has connected to it a second expansion-rod, free to slide in a guide, and carrying a projection, 70', extending through a slot to the outside of the casing at. the lower end of the vertical rod 01.

Patented in England December 2?, 1882, No. 6,142.

l NVhen the gas-burners within the stove or oven are not lighted, the bars k kbeing in their normal state, the projection k is out of the line of the rod a,- but when the door Zhas been opened, and the valve h thus opened, and the jects within the casing ignited, the bars 7c expand, so as to bring the projection k below the rod n, the door 1 having been meanwhile kept open. When the door is now closed, the rod n will rest on the projection 16* and keep the valve it open, as shown in Fig. 1; but should the lights be extinguished the contraction of the bars k 70 will withdraw the proj ection 76* from below the rod it, allow the latter todrop, and close the cock h.

Instead of combining a projection, 19, on the door with a lever, q, to dperate the valve, the door I may be arranged to act on a sliding the rod n, for the purpose described. Instead of having two expansion-barsflc k, with an intermediate lever, one bar may in some cases be sufficient, and in place of the bar a device consisting of a combination of metals acting on the compensating chronometer-balance syster, or as the expander in a pressuregage, may be employed.

I claim as my invention 1. The combination of the supply-pipe of a gas stove or oven having a cock with a door and intermediate devices, substantially as described, whereby on the opening of the door the said cock will be opened.

2. The combination of the supply-pipe of a gas stove or oven having a cock, h, lever i, and rod a, with the door and intermediate devices to act 011 said rod, substantially as and for the purpose set forth.

3. The combination of the supply-pipe ofa gas stove or oven having a cock, h, and operating-rod n, witha door having an inclined projection, p, and lever q, substantially as described. v

' 4.. The combination of the supply-pipe of a gas stove or oven having a valve, 71, and operating-bar a, with an expansion-bar within the oven, and having aprojection adaptedto come within range of said rod n when the said bar is expanded.

5. The combination of the supply-pipe of a wedge-shaped or inclined bar, so as to raise gas stove 01' oven having avalve, l1, and oporto this specification in thepresenceoftwo subating-rod n, with expansion-bars k 70 and i\'- I scribing witnesses.

ot'cd .lcverj within the cnsi11g,thebmr Ir ha v- JOHN \V. 'PLUNKEWI. ing it projection, 7: extending to the outsidv I \Vit'nesses: ofthe casing, substantially as and for the pur- GIIAS. MILLS,

pose set forth. J. AMERY QADNEY, V

In testimony \VllGl'GOfIhiLVG signed mymuno [Io/l1 qf 47 1111100721 5 hm .Fivldx, London. 

